Intermittent discussions search test failure

There is a test failure in the test:

"verify updating the metadata for a discussion, updates the index"

The problem is likely that if `randomText1` and `randomText2` are similar, you get a result when you didn't expect to.

```
  1) Discussion Search Indexing verify updating the metadata for a discussion, updates the index:
     Uncaught AssertionError: false == true
      at /Users/branden/Source/oaeproject/Hilary/node_modules/oae-discussions/tests/test-search.js:93:36
      at /Users/branden/Source/oaeproject/Hilary/node_modules/oae-search/lib/test/util.js:58:36
      at Request._callback (/Users/branden/Source/oaeproject/Hilary/node_modules/oae-rest/lib/util.js:202:16)
      at Request.self.callback (/Users/branden/Source/oaeproject/Hilary/node_modules/request/index.js:148:22)
      at Request.EventEmitter.emit (events.js:98:17)
      at Request.<anonymous> (/Users/branden/Source/oaeproject/Hilary/node_modules/request/index.js:876:14)
      at Request.EventEmitter.emit (events.js:117:20)
      at IncomingMessage.<anonymous> (/Users/branden/Source/oaeproject/Hilary/node_modules/request/index.js:827:12)
      at IncomingMessage.EventEmitter.emit (events.js:117:20)
      at _stream_readable.js:910:16
```